Music-leaf turner.



C. C. LINDENBERG.

MUSIC LEAF TURNER.

APPLICATION FllED JAN. 18.1917;

2 SHEETS-SHEET 1.

1,259,250. Patented Mar. 12, 1918 C. C. LINDENBERG.

MUSIC LEAF TURNER.

APPLICATION FILED JAN. 18. 1917.

1,259,250. Patented Mar. 12, 1918.

2 SHEETS-SHEET 2.

I 4/2 ll .M/

CHRISTOPHER o. LINDENBERG, or READING, MASSACHUSETTS.

MUSIC-LEAF TURNER.

Specification of Letters Patent.

Patented Mar. 12, 1918.

Application filed January 18, 1917. Serial No. 143,166.

To all whom it may concern:

Be it known that I. CHRISTOPHER C. LINDENB RG, a subject of the Czar of Bussia, residing at Reading, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Music-Leaf Turners of which the following is a specification.

This invention relates to improvements in leaf turning apparatus and has for its object to provide a simple, neat and easily operated apparatus for turning the leaves of sheet music or the like by foot power, either forward or backward. as desired.

The invention consists in the combination and arrangement of parts set, forth in the following specification and particularly pointed out in'the claims.

Referring to the drawings:

Figure 1 is a front elevation of the apparatus embodying this invention.

Fig. 2 is a side elevation of the same.

Fig. 3 is an enlarged detail front view of the music rack portion of the apparatus and the leaf'turning instrumentalities. a portion of said rack being broken. away to save space in the drawing.

Fig. 4 is a detail section taken on the line 4- of Fig. 3.

Fig. 5 is a detail vertical section taken on the line 5 5 of Fig. 3.

Fig. 6 is a vertical section through the music rack. illustrating the elevation of the music holding finger.

Fig. 7 is a detail side elevation of one of the clips which engage the leaves of the music. I

Fig. 8 is a detail plan view of a portion of one of the leaf turning members. illustrating the resilient means for maintaining said member in position at opposite sides of the music rack.

Fig. 9 is a detail end elevation of the arm 24 as viewed from the direction indicated by the arrow at, Fig. 4, said view illustrating the offset in the pawl 25 and the manner in which said pawl engages the lugs 21. said lugs being shown in dotted lines.

Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, 1 is a music rack constructed in the usual manner with a shelf 2 extending along the lower edge thereof and upon wh ch rests the music. The rack 1 is preferably supported by a U-shaped bracket 3 se cgred pear the centerthereof by bolts 4:,

i to the upper end of a hollow standard 5. The bracket 3 is bent at 6 so as to give the proper inclination to the music rack 1 in order that the music may remain thereon.

A tripod 7 is attached to the lower portion of the standard 5 and maintains said standard in an upright position. The legs 8 of the tripod 7 are preferably reinforced by braces 9 which are interposed between said legs and a bracket 10 attached to the extreme lower end of the standard 5.

Depending from the bracket 10 is an arm 11 forming a support for a pair of pedals 12 and 18 g ivotally connected at 14 to said arm. Each of the pedals 12 and 13 has an arm 15 extending upwardly therefrom and to said arm is attached a spring 16 which. in turn, is secured at 17 to the depending arm 11. i

The springs 16 for each of the pedals exert constant tension thereon so as to maintain the pedals in their neutral positions. as indicated in Figs. 1 and 2. Any movement of said pedals. either upwardly or downwardly. causes an extension of the springs attached thereto. whereupon when pressure is relieved from said pedals said springs will return them to said neutral positions.

Attached with the bracket 3 to the upper end of the standard is another bracket 18 which forms a support for a spindle 19, said spindle extending upwardly from said bracket 18 preferably into engagement with the underside of the shelf 2.

Pivotally mounted upon the spindle 19 are a number of leaf turning members 20, four shown in the present embodiment. These members are arranged in close proximity to each other and one above the other and each is provided with a depending lug 21. The lugs 21 of the several lea-f turning members are arranged at slightly different distances from the axis of the spindle 19 and when all of said arms are at one side of the music rack said lugs will project slightly beyond the next lug in the series.

Mounted upon the spindle 19, directly beneath the turning members 20, is an actuator 22 consisting of two arms 23 and 24 extend ing in substantially opposite directions from said spindle and free to rotate between the arms of the U-shaped bracket 3. Pivotally attached to the outer ends of each of said arms is a pawl 25.

A tooth '26 on said pawl is adapted to engage one of the lugs 21 when the actuator is rocked in certain direction so as to move the leaf turning member bearing said lug from its position at one side of the rack over to the opposite side thereof. The teeth 26 of the pawls referred to are preferably upwardly offset sections of said pawls so as to engage said lugs during the movements of said actuating levers. The rest of said pawls lie below the ends of the lugs and are arranged so as not to interfere with said lugs, said pawls occupying, when the actuator is at rest, positions at the rear of the groups of lugs 21.

A guard finger 27 extends forwardly from the tooth of each of said pawls a distance sufficient to engage the outermost lug 21 when all of the lugs of the series are in one group, as shown in Fig. i. The guard finger 27 prevents the tooth 26 from engaging any of the lugs except the one which is engaged by said finger. The pawl on the arm 23 of the actuator adapted to engage the inner edges of the lugs 21 with respect to the axis of said actuator, while the pawl carried by the arm 24; of said actuator is arranged to engage the outer edges of the lugs 21.

Springs 28 are adapted to yieldingly retain the pawls in contact with the lugs 21 while stops 29 are provided for said pawls to prevent them from being drawn too far when all of the leaf turning members have been transferred and there are none left to engage the finger 27. The actuator 22 has a pulley 30 arranged substantially concentric with the axis thereof, preferably beneath said actuator and this pulley is operativel connected with the pedals 12 and 13 preferably by means of a flexible member 31 secured adjacent to the middle thereof to the pulley 30 preferably at the point 32.

From the point said member is coiled several times about said pulley in opposite directions and the ends are then led over pulleys 33 mounted adjacent to the upper end of the standard 5 and thence longi tudinally through said standard to the pedals 12 and 13 to which they are respectively attached at 50 to the pedals 12 and 13.

By means of this arrangement, w ien pres sure is applied to one of the pedals downwardly in the direction of the arrow (4, Fig. 2, the pulley 30 will be rotated and the portion of the flexible member connected with said depressed pedal will be unwound from said pulle while the opposite side of the point 82 will be wound thereon, whereupon the other pedals will be elevated an amount equal to the movement of the depressed pedal.

Upon the rotation of the pulley 30 as just stated, the actuator 22 will be rotated therewith to move one of the leaf turning members 20 from its position at one side of the spindle, as shown in Figs. 3 and 4 to the other side thereof, as shown in dotted lines in Fig. 1.

Upon the removal of the pressure from the pedal which has just been depressed the spring attached thereto will return said pedal and likewise the other pedal to their neutral positions and at the same time the actuator 22 will be returned by means of the springs 16 to its central position, as indicated in Figs. 3 and 1.

Owing to the peculiar shape of the guard finger 27 the three last lugs 21 which are to be transferred from one side to the other of the spindle 19 will not be pushed by means of the tooth 26 to the final positions, for the reason that the guard finger will ongage the edge of the lug previously trans ferred and will thereby be disconnected from the next lug or the lug which is being transferred.

In order to complete the movement of said lugs and also the leaf turning arms which carry said lugs, said arms have llattened faces 34 and 35 at opposite sides of the hubs thereof which are adapted to be engaged by a spring 36 which is held in contact therewith by supports 37, 37 engaging opposite ends of said spring and these springs are capable of moving the members 20 either from the position. shown in dotted lines at b to that shown in full lines in Fig. 8 or from the position shown at 0 in dotted lines to that shown at (Z in dotted lines in said figure. Said springs 36 furthermore maintain the leaf turning members in their normal positions.

In the form illustrated but two springs 36 are required; each of said springs, as illustrated in Fig. 5, engages two of the turning members 20. The members 20 are connected to the leaves of the music which rest upon the music rack 1 preferably by means of clips 38 formed from two sections of resilient material riveted together at 39, leaving both extremities of each of the members free to be deflected.

The rivet 39 is placed nearest to the lower ends of the resilient members and these members are bent so as to fit the end of the turning member 20, as will be seen by referring to Fig. 7. The upper ends of the resilient members forming said clip are adapted to contact at 40 so that when the contacting portions are separated and the leaf of the music inserted between said members said ends will yieldingly engage the sheet sufiicient to move the same when the turning members are operated.

The free ends of. the members 20 are so shaped that the clips may be moved lengthwise thereof to conform with the size of the leaf to be turned or, if desired, a number of said clips may be attached to each of said turning members and thus provide ample supporting means for each page during the turning thereof.

To permit the adjustment of said clips longitudinally of the turning members the shelf 2 is cut out at intervals as at 41, permitting the entire group of clips 38 to be adjusted from one cut out section to the other to accommodate for different size of leaves.

During the turning of the leaves of the music it is essential that the central portion of the music, that is to say, the pivotal edges of the leaves, be held firmly against the music rack to prevent the movement thereof when the leaf is turned.

To accomplish this result a holding member 42 has been provided and preferably consists of a piece of wire having a long straight portion or finger 43 which may, if desired, be equal in length to the height of the music rack above the shelf 2. At the upper end of the straight portion 43 a coil 44 is formed, large enough to receive the fore finger of the operators hand.

From the coil 44 the wire forming the same extends rearwardly at 45 substantially at right angles to the straight portion 43 and rotatably engages a suitable bearing member 46. The end of the portion 45 is encircled by a spring. 47 and has attached thereto a collar 48 which is engaged by said spring. This spring and collar cooperate to draw the finger 43 toward the music rack against the music, as indicated at 49.

lVhen it is desired to remove the music from the rack the operator may, by placing the fore finger in the loop 44, move said finger away from the music and then turn the same at right angles to the position which it occupies in Fig. 6, so that the music may be easily removed from the rack.

The operation of the apparatus hereinbefore specifically described is as follows:

The music is placed upon the rack and the holding finger 43 placed in position, as indicated in full lines, Figs. 3 and 6. The clips 38 are then attached to the first four pages respectively of the music, if there are four.

Then it is desired to turn a leaf the pressure is applied to one or the other of the pedals 12 and 1.8 according to the direction in which it is desired to turn this leaf, thereby moving the actuator 22 so that one of the pawls 25 or the other will engage the foremost lug 21 and move the same to the other side of the spindle 19, the spring 36 completing the action of said turning member.

The pedal is then released and the actuator 22 is returned to its normal position in readiness to be operated to move the next turning member in the series or to return the member previously moved to its original position. In this way all of the leaves of the music may be turned one'at a time by means of the foot leaving the hands of the operator free to perform on the instrument before him.

Having thus specifically described my invention what I claim and desire by Letters Patent to secure is:

1. A leaf turning apparatus having, in combination, a standard, a plurality of leaf turning members pivotally mounted adjacent to the upper end of said standard, an actuator pivoted adjacent to the upper end of said standard adapted to move said leaf turning members from side to side, a bracket at the lower end of said standard, a pair of pedals pivoted upon said bracket to rock in parallel planes about a common axis, arms on said pedals, springs connected with said arn'is and said bracket adapted to normally yieldingly maintain said pedals paral lel, and flexible means operatively connecting said pedals with said actuator.

A music leaf turner having, in combination, a music rack, a spindle mounted beneath said rack, a plurality of leaf turning members pivoted on said spindle, an actuator pivoted on said spindle provided with arms extending in substantially opposite directions, pawls at opposite ends of said arms adapted to engage said leaf turning members one at a time and move the same from one side of said rack to the other, and means operatively connected with said I actuator adapted to move the same in one direction. or the other.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

CHRISTOPHER (l. LINDENBERG.

lVitnesses SYDNEY E. TAIT, I-IATTIE E. STRATTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patent:,

Washington, D. G." 

